JPH01503241A - Method for producing linear polyester-polyepoxide reaction products via reactive concentrates - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Method for producing linear polyester-polyepoxide reaction products via reactive concentrates Background of the invention of the law The present invention relates to linear polyesters, and more particularly to advantageous melt viscosity materials from linear polyesters. The present invention relates to the production of branched polyesters having polyester properties.

Linear polyesters, such as poly(ethylene terephthalate) and poly(butylene) lenterephthalate) (hereinafter referred to as rPETJ and rPBTJ, respectively) is , is widely used industrially in the manufacture of articles by molding methods such as injection molding.

Linear polyesters have many of their properties, such as chemical stability, solvent resistance, and Molding techniques such as blow molding, profile extrusion, and thermoforming due to low gas permeability It is an attractive material to work with. One problem with this type of work is that polyester The melt viscosity of the resin is relatively low, so that the molded article retains its shape immediately after molding and before cooling. It is impossible to maintain the condition properly.

Increasing the melt viscosity of linear polyesters as described in U.S. Pat. No. 4,590,259. One way to increase it is to substantially increase its molecular weight. But this This usually cannot be done without the use of special equipment.

Processes requiring high melt strength, such as blow molding, profile extrusion and sheet extrusion For maximum egress processability, polyester should have a low melt viscosity at high shear rates. It is advantageous to have a high melt viscosity at low shear rates. For example, Although low viscosity is desirable at high shear rates in order to extrude the material into a container, , high melt elasticity is required at low shear rates to maintain constant parison dimensions It is said that Increasing molecular weight requires higher melt strength and viscosity at lower shear rates. Improved processability where required, but little or no shear sensitivity No impact. Therefore, high molecular weight helps reduce viscosity under high shear conditions. It's not effective.

In recent years, polyester materials have been developed whose melt viscosity and melt strength can be changed as desired. It is being emitted. For example, in JP-A-56-116749, poly(ether ester) ) The elastomer is triglycidyl incyanurate (hereinafter referred to as rTG I CJ). It is disclosed that a material exhibiting desired blow molding properties can be produced by reacting with It is. A similar PBT process is also described in JP-A-50-96648.

Treatment with polyepoxides, such as triglycidyl incyanurate, results in Branched polyesters are formed by the reaction of the carboxylic acid end groups of the esters with each epoxy group. It is thought that a loop is formed. Due to the twenty-branched polyester during extrusion It exhibits low viscosity at high shear rates such as during suspension of blow-molded parisons. It exhibits high viscosity and melt elasticity at low shear rates, thereby ensuring dimensional stability. will be maintained. These are exactly the properties desired for this type of work.

An additional advantage of this reaction is that this reaction is specifically designed for polyester production. This means that additional equipment is not required. Regular polyester, e.g. PET Using common equipment for the production of %PBT and elastomeric polyesters Can be done. In that case, regular polyester is blended with polyepoxide and usually can be extruded under conditions of , further reaction and branching taking place.

Polyester triglycidyl incyanurate and similar polyepoxy compounds Further investigation of the reaction with It was found that the concentration increased to extremely high levels. Processability with commonly used equipment From this point of view, the melt viscosity at peak concentration can be considered infinite. therefore At this concentration, the product cannot be processed for purposes such as blow molding. like this Examples of concentrations include triglycidyl incyanurate and 40-50 micro equivalents. For polyesters with carboxylic acid end groups in the concentration range of The amount is %.

Above and below the peak concentration, the melt viscosity decreases first rapidly and then gradually. Book The optimum conditions for the purposes of the invention are some distance down from the steepest part of the curve. is obtained at a point where the absolute value of its slope is still quite high.

Blending the polyester with a polyepoxy compound using an extrusion-like operation It is not possible to obtain these points reliably and uniformly by simply using a method such as melt blending. is extremely difficult. Incomplete blending may cause the melt viscosity to be too high or Areas that are too low or uneven, resulting in lumps and/or gelled areas. I feel sad. Furthermore, even if the target concentration is missed by a relatively small difference, the melt viscosity remains as desired. The melt viscosity may be much higher or lower than expected. one of them may result in flaw areas in the final molded article.

Another disadvantage of simple blends is that some types may contain irritants and/or health hazards. It is necessary to handle the polyepoxide product repeatedly for a long time. for example , triglycidyl isocyanurate has mutagenic properties. Therefore, to the body Contact and inhalation should be avoided as much as possible.

U.S. Pat. No. 4,141,882 describes PET and polyepoxides, e.g. Almost infinite melt viscosity problem in compositions consisting of triglycidyl cyanurate is implicitly dealt with. Relatively low molecular weight epoxide reactivity is the solution. compounds, typically carboxylic acids such as benzoic acid. polyepoxide and epoxide-reactive compounds can also be blended simultaneously with polyester , pre-blended to form a “modifier” which is then blended with the polyester. It is preferable to

For various reasons, this solution is often insufficient. First, low molecular weight The reaction of poxide-reactive compounds with polyepoxides proceeds statistically rather than selectively. , so a certain proportion of the polyepoxide molecules have all the epoxy and oxy groups consumed. However, other molecules remain completely unreacted, and therefore the final product is Non-uniformity and therefore unpredictability in morphological properties results. Second, epoxide reactivity The polyepoxide reacted with the compound is thus at least partially inactivated. This means that even under the best morphological conditions this type of epoxide-reactive compound This means that more polyepoxide is required than without. Third epoxidation, in which a substantial portion of the polyepoxide has reduced functionality through reaction. This compound can be used to end-cap or extend the chains of polyesters. It only fulfills its role. Therefore, even the best results will only increase the molecular weight. , this has limited value for the reasons mentioned above.

Other problems arise with the use of low molecular weight epoxide-reactive compounds. For example, Polie We handle poxides and blend useful proportions of polyepoxides with polyesters. The problem is that partial reactions with other low molecular weight compounds may not be of any use. It has not been addressed in any sense. and epoxide-reactive compounds such as benzoic acid. When used at rates in the upper end of the disclosed range, coloration of the polyester occurs, which is undesirable in some cases.

Disclosure of invention The present invention allows for conversion into branched polyesters with advantageous melt viscosity properties. Provides an improved method for producing linear polyester-polyepoxide compositions . The above method can easily produce a homogeneous material without any potentially flawed areas. and minimize body exposure to irritants and potentially harmful chemicals. Finish. This method involves the use of polyepoxide to obtain the desired melt viscosity properties. The use and proportion thereof are also kept to a minimum. Finally, the present invention provides for branching with desired properties. Also included are novel compositions that can be converted to polyesters.

In one aspect, the present invention includes: (1) (A) At least one poly(0- or N-epoxyalkyl substituted) ring (B) a substantial proportion of esters and carbons; at least one bonate structural unit and a measurable proportion of free carboxylic acid groups. forming a reactive concentrate by reacting with at least one linear polymer having and (II) the concentrate having (C) a substantial proportion of free carboxylic acid groups. melt blending with at least one linear polyester, The proportion of reactant A used in step (1) is at least about 3 parts per 100 parts of reactant B. parts by weight and about 0.1-3.0 parts per 100 parts of the total amount of reactants B and C. A method for producing a branched polymer is provided.

Specific explanation The reactants used in the process of the invention typically contain a small number of non-epoxy cyclic moieties. At least one poly(0- or N-epoxyalkyl substituted) cyclic amide, imide or imidates, but compounds with linking or fused moieties are also within the scope. Ru. Reactant A is a compound in which an epoxyalkyl group is directly bonded to an oxygen or nitrogen atom. compounds containing intervening structures, such as 2-cal Voglycidyloxyethyl compounds can also be used.

It is necessary that there be more than one epoxy group per molecule. This kind of group is It is highly preferred that there be 3 or more, 3, and only 3. , production of branched polyesters with minimal crosslinking and resulting gel formation This is particularly preferred because it is easy to do so.

Examples of cyclic nuclei that can be present in reactant A include triazine, barbyl, etc. Acid ester, hydantoin, uracil, pyromellitic acid diimide, piperazine diimide on, and parabanic acid ester ring systems. As mentioned above, epoxy-containing A functional group can be present as a substituent on an oxygen or nitrogen atom; It is often preferred that the The most suitable compounds are triazine derivatives, such as Examples are triglycidyl cyanurate and TGIC. TGIC is easy to obtain is particularly suitable for forming branched polyesters. T.G.I. C has the following formula.

CB:I CH-C)I In the first step of the process of the present invention, the reactants are introduced (B) substantially ester in a suitable proportion (usually 40% mol or more, preferably 75-100 mol%) and and carbonate structural units, and also has a free carboxylic acid group. A reactive concentrate is formed by reacting with at least one linear polymer.

This reactant can be used as a polymer if carboxylic acid end groups are present, as explained below. ester, polycarbonate, polyester-polycarbonate, or other constructions. Copolyesters or copolycarbonates with structural units can be it is obvious.

Linear polyesters are preferred. These may be crystalline or amorphous, but crystalline It is preferable that

The ester structural unit of reactant B usually has the following formula: % formula % () in which each R1 independently represents a divalent lipid containing about 2-10 carbon atoms. an aliphatic, alicyclic, or aromatic group, each R2 independently being about 2-10, usually about 6 - a divalent aliphatic, cycloaliphatic or aromatic group containing 10 carbon atoms.

Polyesters containing this type of unit are dihydroxy compounds, dicarboxylic acids or functional derivatives of, such as anhydrides, acid chlorides, or lower alkyls (particularly methyl ) can be prepared by known reactions with esters, preferably esters .

The R1 group is one or more aliphatic or cycloaliphatic hydrocarbons containing about 2-10 carbon atoms. For the purposes of this invention, alicyclic groups are equivalent to aliphatic groups. are known to those skilled in the art. These are aliphatic or cycloaliphatic dihydroxy compounds, For example, ethylene glycol, 1,4-butanediol, propylene glycol, 1.3-propanediol, 1.6-hexanediol, 1.10-decanediol 1,4-cyclohexane dimetatool and 2-butene-1,4-diol It is most often derived from Aromatic dihydroxy compounds, especially bisphenols Polymers such as bisphenol A can also be used. R1 group is dihydroxy Substituents that do not substantially alter the reactivity of the compound (e.g. alkoxy, halo, nitri) ) or foreign atoms (eg oxygen or sulfur). aliphatic and alicyclic R1 groups are usually saturated.

R2 groups are succinic acid, adipic acid, maleic acid, isophthalic acid and terephthalic acid, or derivatives derived from acids such as similarly substituted and heteroatom-containing acids.

At least some of the R+ and/or R2 groups are soft reactant groups, such as poly( Also within the scope are polymers that are (oxyethylene) or poly(oxybutylene).

This type of polymer is used in the polymerization reaction with polyethylene glycol, caprolactam or By introducing compounds such as dicarboxylic acids containing lyoxyalkylene moieties, It can be manufactured by using elastomeric materials and is usually elastomeric. This kind of polyester For example, DuPont and General Electric They are commercially available under the brand names HYTREL and LOMOD, respectively. ing.

R1 and R2 preferably contain usually about 2-10 carbon atoms, preferably 2-6 carbon atoms. It is a hydrocarbon group containing children. Most often R1 is aliphatic and R2 is aromatic.

The polymer is poly(alkylene terephthalate), especially PET or PBTl, especially after It is most desirable that the This is usually done by gel permeation chromatography, or 6 Mixture of 0% by weight phenol and 40% by weight 1,1,2,2-tetrachloroethane The number average molecular weight measured by intrinsic viscosity (IV) at 30°C is about 400 in the compound. 0 or more, preferably in the range of about 10,000-70,000.

Polycarbonates are also useful as Reactant B. Bori 11 (■ , where A1 is an aromatic group.

Suitable A1 groups include m-phenylene, p-phenylene, 4°4'-biphenylene, 2,2-bis(4-)propane, 2,2-bis(3,5-dimethyl- 4-phenylene)propane, and similar groups, such as U.S. Pat. No. 4,217. Dihydres disclosed by name or formula (generic or specific) in No. 438 There are groups corresponding to roxyaromatic compounds. Groups containing non-hydrocarbon moieties can also be used . These include substituents, such as chloro, nitro, alkoxy, etc., and also linkages. groups such as thio, sulfoxy, sulfone, ester, amide, ether and It can also be carbonyl. However, if all A1 groups are hydrocarbon groups, is the most common.

, a, I groups are preferably of the following formula: %formula%() , each A2 and A3 in the formula is a divalent monocyclic aromatic group, and Y is a crosslinking group, The one or two atoms are interposed between A2 and A3. Free atoms in the formula ■ The 5 bond is usually in the meta or bara position with respect to Y in A2 and A3. This kind of A The I group is thought to be derived from bisphenol with the formula: HO-A2-Y-A30H. can be done. Bisphenol is frequently mentioned below, but other than bisphenol It will be understood that it is also suitable to use A1 groups derived from suitable compounds of.

In formula (■), the A2 and A3 groups may be unsubstituted phenylene or substituted derivatives thereof. Examples of substituent(s) include alkyl, halo (particularly chloro and/or (or bromo), nitro, and alkoxy. Unsubstituted phenylene groups are preferred. Ru. Preferably both A2 and A3 are p-phenylene, but both are 0- or or m-phenylene, one is 0- or m-phenylene and the other is 0- or m-phenylene. may be p-phenylene.

The bridging group Y separates A2 and A3 by one or two atoms, preferably one atom. This is what is being done. This is most often a hydrocarbon group, especially a saturated group, e.g. tyrene, cyclohexylmethylene, 2-[2,2,11-bicyclohexylmethylene Tylene, ethylene, 2,2-propylene, 1,1-(2,2-dimethylpropylene) ), 1.1-cyclohexylene, 1.1-cyclopentadecylene, 1.1-cyclohexylene Chlohexylene or 2,2-adamantylene, especially gem-alkylene group It is. However, unsaturated groups, and atoms other than carbon and hydrogen, wholly or partially Also included are groups constituted by . Examples of groups of this type include 2,2-dichloroethylidene. carbonyl, thio, and sulfone. readily available and particularly for the purposes of the present invention. For reasons of suitability, bisphenol A is preferred as a group of formula is derived from Y is inpropylidene, 2,2-bis(4-phenylene) where A2 and A3 are each p-phenylene ) is a propane group.

Polyester-polycarbonates can also be used as component B. this is Usually at least one dihydroxy aromatic compound is combined with phosgene and at least one dihydroxy aromatic compound. one dicarboxylic acid chloride, especially isophthaloyl chloride, terephthaloyl chloride or can be obtained by reacting with a mixture of both. this kind of Polyester-polycarbonate contains structural units of formula (■) in combination with units of formula (I). have

For the purposes of the present invention, component B has a measurable proportion of free carboxylic acids determined by titration. It is essential to have a phosphoric acid group.

In the case of polyester and polyester-polycarbonate, these groups are Mostly terminal groups, the concentration of which is usually measured as microequivalents/g.

In the case of polycarbonate, for example, the method disclosed in U.S. Pat. No. 4,562,242 As shown, the carboxylic acid group is often a carboxylated bisphenol or exists as a substituent on a structural unit derived from However, carboxylic acid-terminated polycarbonate carbonate is produced using hydroxybenzoic acid or its ester as a chain terminator. The conventional interfacial polycarbonate method is carried out, and then terminal ester groups are added as necessary. It can also be produced by hydrolysis. This method and this method The compositions thus produced are described in U.S. Patent Application No. 109,873 (October 1987). It was disclosed and claimed on the 19th.

Carboxylic acid group concentrations in the range of about 5-250 microequivalents/g are often suitable.

Since polyester decomposes to some extent during extrusion, the ends of the scales subjected to the reaction The concentration of groups may increase. However, the carboxylic acid end group concentration is about 10-100 , especially about 30-100, and preferably about 40-80 microequal Hk/it. It is often preferred to use polyester.

The proportion of reactant A in the reactive concentrate is determined, particularly when reactant A is TGIC and reactant RB is is PBT, preferably at least about 3 parts per 100 parts by weight of reactant B. Approximately 3-20 parts by weight.

The production of reactive concentrates can be carried out in solution or in the melt. Typically, Melt reactions, including extrusion, are generally preferred because they can be conveniently performed with readily available equipment. suitable.

Reactants A and B are typically triblended and then heated to temperatures in the range of about 200-300°C. Extrude at temperature.

The reactive concentrate produced in the first step mainly contains end-capped polyesters; A typical molecule will have two epoxide functionalized end groups. 2 moles or more of polyester reacted with 1 mole of polyepoxy compound, resulting in chain extension. Polyester may also be present in small amounts. Concentrates are not considered to be significantly branched. , similar in appearance and many physical properties to the resin used as reactant B. Ru.

No clear signs of phase separation are observed in the concentrate.

The relevant physical properties of the concentrate are dominated by the polyester chains and the epoxide The effect of the activated end group is extremely small. As a result, the above concentrate becomes unreacted polyester. It is highly compatible with esters, resulting in improved dispersion of concentrates in the second step described below. It will be done.

The concentrate is dust-free and skin contact and inhalation with Reactant A is easily prevented. Tori It can also be easily pelletized for easier handling. (for example) 1x Continuous or repeated handling of reactant A by producing the above concentrate of H. There is no need to

Concentrate production uses a much higher concentration of reactant A than traditional blend production. Considering that the above concentrates are made of polyester are not expected to be that similar.

In the second step, the reactive concentrate produced in the first step is added to a measurable proportion (as defined above). fused with at least one linear polyester having free carboxylic acid groups of Blend. The polyester described above with respect to reactant B can be used with reactant C. In fact, reactants B and C can be combined with the same polyester. It is generally preferred to do so. However, another advantage of the invention is that e.g. By such means as using PBT as substance B and PET as reactant C. , in being able to adjust the product.

The melting reaction conditions used in the second step are as follows: The conditions are almost the same as those used in the first step. The proportion of reactive concentrate and reactant C is: Especially when reactant A is TGIC and reactants B and C are both PBT, The amount of reactants per 100 parts of the total amount of reactants B and C is about 0.1-3.0 parts, preferably Preferably, it should be about 0.4-0.6 parts. (Of course, reactant A is , a significant proportion of it has reacted with reactant B, so it remains as it is in the second step. It doesn't exist, at least not in this proportion. ) The method of the present invention involves tri-blending the reactive concentrate with reactant C to form an intimate solid block. This is done by making a blend and then melting it as described above. It's often convenient. The epoxide groups in the reactive concentrate are homogeneous and have a relatively low concentration. Therefore, the concentration of this type of group in the blend with reactant C can be "fine-tuned" to It is easy to optimize subsequent reactions to achieve the desired melt viscosity.

Another aspect of the invention is therefore a blending of the above-mentioned reactive concentrate and reactant C. In this composition, reactant A is mixed with reactants B and C. A total of about 0.1-3.0 parts by weight per 100 parts total amount is used.

Compositions produced by the method of the invention may include other substances that are substantially chemically inert. The quality can be blended at any suitable blending stage, especially during the second step. . These substances include fillers, reinforcements, flame retardants, pigments, dyes, stabilizers and antistatic agents. , mold release agents, and impact-modifying polymers; examples of impact-modifying polymers include , alkyl acrylate, diene and/or styrene units; There are core-shell polymers that have a shell consisting of alkyl methacrylate units.

The viscosity properties of the polyester-TGIC composition were as per Example 1 for polyester. This is illustrated by a series of experiments using PBT as described below. Table 1 shows the original PBT , extruded PBT, and triblend and extruded PBT as also described in Example 1. Melt viscosity and specific properties of various PBT-TGIC mixtures produced by extrusion The viscosity (in the phenol-tetrachloroethane mixture mentioned above) is mentioned.

Table l Melt viscosity per 100 parts of PBT Intrinsic viscosity TGIC17) parts (Poise Xl 02) (di/g) 0 (untreated PBT) 75 1, 150 (extruded PBT )　55”　- 0,81579- Zero Zero l・0　1.36 3.0 14B 1.18 4.0 104 - 5.0 80 1.11 6.0 70 - 7.0 39 1.0? 10.0 22 1.00 20.0 20 - Until the ratio of TGIc per 100 parts of PBT rises to a value of about 1-2 parts, , the melt viscosity increases substantially and the intrinsic viscosity also increases moderately. is clear. When TGIC exceeds 3.0 parts, the melt viscosity decreases rapidly, and 5 In the range of -7 parts, the value of PBT is almost reached, and when the TGLC concentration is further increased, the melt viscosity increases. The degree decreases further. Therefore, when a concentrate is produced by the first step of the present invention, , a blend containing a smaller proportion of TGIC and a substantially higher melt viscosity. A material with properties most similar to those of unreacted PBT is obtained.

The conditions of the nth step provide excellent dispersion of the reactive concentrate into the reactant C, and the A high and uniform branching throughout the composition is ensured, reducing undesirable gel formation. Ru. The compositions thus obtained generally exhibit It exhibits a much lower melt viscosity than the melt viscosity shown in Table 1. Therefore, these The composition can be conveniently extruded for purposes such as blow molding and profile extrusion. .

The above compositions are also generally made by blending neat TGIC with polyester in the same proportions. Higher melt viscosity after extrusion than blends, other advantages compared to unmodified polyester often exhibit unique properties, particularly higher impact strength and improved ductility.

The method of the invention is illustrated by the following examples.

Example 1 The number average molecular weight (measured by gel permeation chromatography) is approximately 50,000, and the PBT with a bonic acid end group concentration of approximately 45 microequivalents/g was heated at 120 μm in a circulating air oven. ℃ for 4 hours, then triblended with TGIC in various proportions, and It was extruded in a ring screenie extruder at 40 Orpm and 266°C. Target reactivity concentration The thick extrudates were quenched in water, pelletized and dried again. Next, add this It was triblended with PBT and extruded under the same conditions.

The relevant proportions and melt viscosities are shown in Table n. Melt viscosity is Tinias-Olsen (Tin1us-01sen) Measured at 250°C with a melt blast meter. .

■Table Blend per 100 parts of PBT TGICO part melt viscosity Concentrate medium Blending (Poise x 102) 20 0.5 371 B O, 4281 50,4356 40,4388 30,4378 Example 2 Concentrates and blends listed in Table 1 from the same PBT according to the procedure of Example 1 was further manufactured.

■Table TGIC parts per 100 PBT copies 4.3 0.53 5.0 0.6 5.3 0.51 8.3 0.5 25.0 0.5 Example 3 PBT in the n-th step was used as commercially available PET (Rohm & Haas Company - RohI& Instead of grade 5202A sold by Haas Co. The procedure of Example 1 was repeated. The results are shown in Table ■. Measurement of melt viscosity at 265℃ went.

■Table Parts of TGIC per 100 parts of polyester Blend melt viscosity in concentrate (Poise X102) 10 0.5 39.8 20 1.0 47.4 1 Untreated PET *1 press out PET Example 4-6 Using the following polymer as reactant B and following the procedure of Example 1, the TGIC-containing 1 yen concentrate was manufactured.

Example 4-r: +da/<-/ri (KODAPAK) 7352J, unique Commercially available PET with a viscosity of 0.74 dl/g.

Example 5 - “CLEAR TUF 1008 BJ, intrinsic viscosity Commercially available PET0 with 1.04 dl/r Example 6 - HYTREL 4058J, DuPont nt).

The above concentrate was then blended with the PBT of Example 1 and the blend was used in Example 1. Extruded under conditions. The melt viscosity of the product was determined by the polyester blend in the absence of TGIC. The melt viscosity was compared with that of a control material consisting of related parameters and test results. It is shown in Table 7.

Table V Concentrate blend Polymer 100 Polymer 100 Extrusion temperature per part melt viscosity Xl02) Example Part of TGIC (“C”) Part of TGIC Product Control 4 5.3 271 0.5 422 955 5.3 268 0.5 - − 6 11.1 210 0.5 392 70 countries international survey report Complaint investigation report USε801368 SA　22175

Claims (19)

[Claims] 1. (I) (A) at least one poly(O- or N-epoxyalkyl substituted ) cyclic amide, imide or imidate; (B) ester and It has at least one type of carbonate structural unit and has a number average molecular weight of at least about 4. ,000 and having a measurable proportion of free carboxylic acid groups. A reactive concentrate is formed by reacting with one linear polymer and (II ) the concentrate as described above; (C) at least one species having a substantial proportion of free carboxylic acid groups; It consists of a process of melt blending with linear polyester. The proportion of reactant A used in step (I) per 100 parts by weight of reactant B is at least is also about 3 parts, and about 0.1-3.0 parts per 100 parts of the total amount of reactants B and C. A method for producing a branched polymer. 2. When reactant A is a single triazine, barbiturate, hydantoin, or Rasil, pyromellitic diimide, piperazinedione, or parabanic acid ester The epoxyalkyl group in reactant A is directly attached to the oxygen or nitrogen atom. 2. The method of claim 1, wherein: 3. Reactant B is polyester, polycarbonate or polyester-polycarbonate 3. The method according to claim 2, wherein the carbonate is carbonate. 4. 4. The method of claim 3, wherein reactant A is triglycidyl isocyanurate. 5. Reactant B has the following formula: ▲There are mathematical formulas, chemical formulas, tables, etc.▼Linear polyester consisting of the structural unit (I) and each R1 in the formula independently represents a divalent lipid containing about 2 to 10 carbon atoms. an aliphatic, cycloaliphatic, or aromatic group, a divalent aromatic group in which R2 contains about 6-10 carbon atoms; 5. The method according to claim 4, wherein the group is an aromatic group. 6. Reactant C has a carboxylic acid end group concentration in the range of about 10-100 microequivalents/g. with poly(ethylene terephthalate) or poly(butylene terephthalate) 6. The method of claim 5. 7. 7. A method according to claim 6, wherein step I is carried out in the molten state. 8. Reactants B and C are the same, each R1 is ethylene or tetramethylene, each R2 7. The method according to claim 6, wherein is p-phenylene. 9. The proportion of reactant A is about 3-20 parts per 100 parts of reactant B, and The method according to claim 8, wherein the amount is about 0.4-0.6 parts per 100 parts of the total amount of quality B and C. Law. 10. Reactants B and C each have a carboxylic acid end group concentration of about 40-80 my The method according to claim 9, which is poly(butylene terephthalate) having a chloro equivalent/g range. Law. 11. (A) at least one poly(O- or N-epoxyalkyl substituted) ring amide, imide or imidate and (B) a substantial proportion of ester and carbon. has at least one type of carbonate structural unit and has a number average molecular weight of at least about 4.0 00 and has a measurable proportion of free carboxylic acid groups. reaction product with a linear polymer (the proportion of reactant A is less than 100% of reactant B) (approximately 3 parts by weight) and (C) at least one linear polyester having a substantial proportion of free carboxylic acid groups; containing a blend of reactants A per 100 parts of reactants B and C combined. The composition was used in an amount of about 0.1-3.0 parts. 12. triazine, barbituric acid ester, hydantoin, in which the initial reaction substance A is a single one, Uracil, pyromellitic diimide, piperazinedione, or varapanate The epoxyalkyl group is directly bonded to the oxygen or nitrogen atom. The composition according to claim 11. 13. Reactant B is polyester, polycarbonate or polyester-polyester 13. The composition according to claim 12, which is a carbonate. 14. The composition according to claim 13, wherein reactant A is triglycidyl isocyanurate. thing. 15. Reactant B has the following formula: ▲There are mathematical formulas, chemical formulas, tables, etc.▼Linear polyester consisting of the structural unit (I) and each R1 in the formula independently represents a divalent lipid containing about 2 to 10 carbon atoms. an aliphatic, cycloaliphatic, or aromatic group, a divalent aromatic group in which R2 contains about 6-10 carbon atoms; 15. The composition according to claim 14, which is an aromatic group. 16. Reactant C has a carboxylic acid end group concentration of about 10-100 microequivalents/g. Range of poly(ethylene terephthalate) or poly(butylene terephthalate) The composition according to claim 15. 17. Reactants B and C are the same, each R1 is ethylene or tetramethylene, each R 17. The composition according to claim 16, wherein 2 is p-phenylene. 18. The proportion of reactant A is about 3-20 parts per 100 parts of reactant B, and the reaction 18. About 0.4-0.6 parts per 100 parts of the total amount of substances B and C. Composition of. 19. Reactants B and C each have a carboxylic acid end group concentration of about 40-80 my 19. Poly(butylene terephthalate) in the range of chloro equivalent/g. Composition.